Poorman' Gems vs FRC Headless Bloodletting Beast
Glyph: zkkuat7j
Build: 3 poorman's gems (shown at the end)
This run took a while to get right because a lot of his moves are hard to dodge, especially at such low health!
Ended up getting an OoS Heavy Abyssal with +10.4 Physical ATK and a stamina cost curse which is insanely lucky!